Locking mechanism for cash-registers.



H. A. MARTIN. LOCKING MECHANISM FOR CASH REGYISIERS. APPLICATION FILED mu :3. 19141 1,215,567. Patented Feb. 13,1917:

3 SHEETS-SHEET 1.

, $811 ""K Q 1 7 1, 1 I 37 r MF mum; LOCKING MECHANISM FOR CASH RE SISTERS.

, Patented Feb. 13, 19m

- "3 SH lETS -SHEET 2- APPLICATION FILED JU LY 13. I914.

Gamm

I rm. MARTINL LOCKING MECHANISM FOR CASH REGJSTERS.

APPLICATION FILED JULY l3, I914 j i Patented Feb. 13,1917. I

3 SHEETS-SHEET 3.

I aon I a m, 51km ITE D STATES PATENT n HAAKON A. MARTIN, OF DAi TON, OHIO, ASSIGNOB TO THE NA REGISTER COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO, (IN QOBPORATED IN LOCKING MECHANISM FOR CASI I-BEGISTIERS.

To all whom it may concern:

Be it known that. I, HAAKON A..MART1N, a citizen of ,the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Locking Mechanism for CasliRegistei's, of which I declare .and other machines employing manipulative devices of like nature.

The principal object .of thisinyention is to so construct .a detent mechanism for depressible keys, that the keys cannot be operated to perfom one of their functions and wrongfully and immediately be returned to undepressed position before their other functions are performed or before the H proper time for their release during the operation of the machine. Another object of the machine is to provide a detent .mechanism adapted toperform certain functions entirely independent and beyond the control of the operator, which functions have heretofore been under control of the operator through the possibility of improper manipulation of the keys or other devices.

ing

In, the preferred form of embodiment dis closed herein, an improved detent mecha nism is provided for locking the keys in depressed position and unlocking the operatmechanism and this means is so constructed that the keys cannot be operated adroitly to release the operating mechanism and immediately returned to undepressed position. This improved detent mechanism in the illustrative form disclosed herein, comprises a single key locking detent and a device operated by automatic means,

such as a spr1ng,'the automatic means .be-.

ing designed to operate the detent for the purpose of releasing the machine after the detent has been operated partially by'a key. These keys, employed to release the machine, may be clerks keys or transaction keys for performing any one or more of the well known functions usually performed by such keys or they may be amountkeys for controlling the difl'erential mechanism for ac- Specmcation of Letters Patent. Pg ,tentd Feb, 13, 1917. Application filed July 18, 1914. Serial No. 850,65 3. i

counting devices. For the sake of convelb ience these releasing keys will be.called initialkeys herein Heretofore, in machines'employinga'single .detent L for lo cking keys in depressed position and rele: sing the -machine it was found diflicult to :onstruct the partsso ac curately that the keys would be locked by the detent at the very instant that the ma} chine was released. If the partswere not accurately constructed thekeys might be depressed gently and gradually to operate thedetent sufiicier tly to release the machine l but not sufficiently to lock thedepressed key in depressed posi3ion. Under such conditions, as soon as the operating mechanism was released and its operation begun the key. could be returned to normal position without performing i ".s other functions during. the operation of the machine. Furthermore with the single dc tent constructions, heretofore known, it was possible sometimes to give a. key a sharp blow to releasethe operhe atingmechanism, the keybeing quickly pulled out before the detent moved into position to lock it in depressed position. Such operations (f a key wouldbe effective to release the marhine but as the key would i not be retained in osition to perform its other functions as or example controlling an indicator or. t 'pe carrier, during the. operation of the ma chine an incomplete or'in} correct indicatiol. or record would be en tered in themachine thereby enabling the; person operating the machine to perpetrate a fraud. To avoid these objections some Well known mac] lines, employ two detents, one detent being used to retain the keys in depressed positicn while the other detent. releases the machine so that the operating mechanism can n)t be released until the de-' pressed key is locked in by the key loc king detent. Even with the use of twovdetents, however, it has b zen found that a very close timing of the pa .tsis necessary and, therefore, in some machines devices are used in conjunction with the two detents to insure their proper opt ration. While the use of the present invention vwhich employs but one, detent has advantages over -.the two -de tent construct .on as the present detent the present invention is shown applied is construction less, and as there is one instead of two detents, the keys are easier to operate.

A further object of this invention is to provide means, in connection with the present improved detent-mechanism, to prevent a second operation of the machine when one of the releasing keys is held manually in depressed position until after the end of an operation of the machine. a

The particular form of machine to which that disclosed in Letters Patent of the 'United States, issued April 13, 1897, to J P.

Cleal and F. A. Reinhard and numbered 580,378 and June 29, 1915, to Charles F. Kettering and William A. Ghryst, numbered 1,144,418. It is not intended, however, to

" limit the invention to use with this particular type of machine as the invention is susceptible of use in' other types ofv machines" without departing from the scope of the present invention.

With these and incidental objects in view the invention consists of certain. novel features of construction and combination of parts the essential elements of which are set forth in appended claims anda preferred form of embodiment of which is hereinafter described with reference to the drawings which accompany and form part of this specification.

Of said drawings:

Figure 1 is a left hand side elevation of thetype of machine, shown in .the above mentioned patent, with certain parts omitted and the upper part of the machine broken away and showing the present invention applied thereto. V

Fig. 2 is a detail View of the locking pawl and disk for normally locking the operating mechanism against operation.

Fig. 3' is a partial detail viewshowing the detent mechanism of the present invention in operated position.

Fig. 4-is a righthand side elevation of the machine with the upper part of the machine broken away and showing locking means for the motor driven operating mechanism.

Fig. 5 is a right hand side elevation of the machine showing the motor driving means- The type of machine to which the present improvements are shown applied is old and well known and need not be described in detail here. This type of machine in general comprises a plurality of amount keys 10 (Fig. 4) which act to control the differential adjustment of the diflerential mechanism for accounting devices. This differential mech-' anism and the accounting devices are not shown in the present application as they form no part, and are not necessary tothe understanding, of the present invention. The difi'erential mechanism is driven by opcrating segments 11, see Fig. 1, fast on a.

; As shown in Fig. 1, the left hand bank of keys comprises two classes of keys, 1:. 6.. amount keys 10 and initial keys 14 the two upper keys being amount keys and the seven lower keys being initial keys. It is of course to be understood that the number of keys of each class in the bank may be varied or the amount keys 10 be entirely omitted fronr this bank if desired. There is a locking de tent 15 for each bank of amount keys and one forthe two amount keys shown in Fig. 1 and the keys when depressed, slightly rock the detents upwardly about the shaft 12 bv the cooperation of the inner ends .of the keys -with slots .(not shown) formed in the detent as is well known in the art and illustrated in the hereinbefore mentioned patent. The locking detent 15 for the two amount keys shown in Fig. 1 cooperates only with the amount keys and not withthe initial keys. When an amount key in any bank is depressed the detent 15 for the particular bank is raised and locks the other amount keys in the bank against operation during the operation of-the machine. I a detent 15 a slidably mounted latch plate 16 is drawn rearwardly by a shoulder .18 on the plate under the lowerforward in its raised position and thereby lock thrits spring 17 tomove ,end of the detent to lock the latter unoperated amount keys against operation. It is understood of course that there is one of these latch plates 16 for each detent 15. To release the'depressed amount keys during an operation of the machine to permit the keys tobe. restored to normal position by' their springs 19 the driving segments 11 have downwardly extending projections 20 which near the endof the counter clockwise movement (Fig. 1) of the segments engage rollers 21 on the operated latch plates 16 to force thelatter forwardly slightly past nor mal position shown in Fig. 1. The detents then are rocked downwardly by springs (not shown) and the lower forward edges of the detents are thereby moved into the path of movement of shoulders 22 on the latch plates 16 so that, when the segments 11 are rocked clockwise to normal position, the latch plates 16 will be drawn slightly rearwardly by their springs 17 and bestopped in normal positions by the shoulders 22.

The improved detent mechanism of the present invention for the initial keys 14 comprises a detent 24 (Figs. 1 and 3) hav- Upon the raising of ing notches 25 at its upper and lower ends straddling pi 26 to guide the detent in its movements. Pins "27 on the initial keys 14 project over the detent and when a key is depressed its pin engages an inclined edge 28 ot the appropriate one of a series of slots 29 formed in the detent '21 and adjacent the pins 27 to elevate partially the detent 24, against the action of a. spring 30 which is connected at its upper end to an arm 31 on the detent and at its lower end to the machine frame. The pins on the amount keys do not project over the detent 21 and i no slots 29 are provided therefor and there- .fore operation of one of these amount keys .does not effect movement of the detent. The

arm 31 carries a roller 33 normally engaging the rear edge of an arm 34 just below the lower side of a ramming notch 35 formed in the upper rear edge of the arm 34. This arm 3+ is fast on a shaft 37 which extends across the botton'i of the ii'iaehin'e and a spring 38, which is much superior in strength to the spring 30 tends to rock the arm 34. and shaft 37 counter clockwise as viewed in Figs. 1 and 3. \Vhen a key is depressed the detent 2-1: is raised sufliciently to carry the roller 33 into position to cooperate with the lower side of the notch 35, whereu iion. the arm 34 is rocked rearwardly by its spring 38.. The lower side of the slot 35 isinclined to. form. a cam surface which cooperates with the roller 33 to elevate the detent 2% beyond the point to .which it had been elevated by the depressed key 14 when the arm 34L is rocked rearwardly. The de tent 24 is shown in its completely operated condition in-Fig. 3 and it can be seen from this figurethat hookprojections 40 formed by the slots 29 in the detent Slipass over the pin 27 on the operated initial key to lock it in depressed position and passes under the pins 27 on the unoperated keys to lock them against depression, it being understood of course that only one initial key is depressed at each operation of the machine, In the normal position of'the plate 16 a roller 41 carried thereby stands a little to the left of the rear edge of the arm 31 as shown in Fig. 1. \Vhen the arm 34 is then rocked rearward or in a counter clockwise direction as shown in said Fig. 1, the rear edge of said arm will engage or be directly adjacent said the machine.

spring 38 rocks the arm 3 slightly counter clockwise to nc r na rear edge of saii. arm will again, rest against roller 33.

The machine in the present form of em- 'bodii'nent disclosed herein is shown asopall.

position wherein the" i erated by an el ctric motor but it is to be i understood that the machine may be operoperating handle, many of the machines of ated by any oth 2r suitable means such as an this type on tl' e market being capable of being operated iy either a motor or an operating handle, as desired. The locking device shown in Fig. 9. for locking the machine against operation when either an operating handle or a motor is used, will be described first in connection with the present invention and t am the motor locking'mechanism and connections shown in Fig. 4 will be described. iiigidly connected to an operating crank landle 39, the lower end of which shown brokenaway in Fig. 1, is a gear 42 nieshinzwith a large intermediate gear 56. The 1: tter gear meshes with a gear 4+ fast on a shaft 45. The main drive shaft 13 carries a get 1' 43 which meshes with the manyteeth asihe gear #2 so that two rotations of the crank handle 39 is necessary to give the gears 43 and H and their shafts one complete rotation at each ('iperation. of

the shaft .5 aid is provided with a notch 47 into which 1- nose 48 on a locking arm 49' normally pro ects normally to lock the shaft 4,5 again it rotation. The arm 49 is fast on a shat. 50 which also carriesfast thereon an arm 51 (Fig. 1). A spring (not shown) normally retainsthe arms 49 and 51] v and shaft 50 ii". the position shown in F igs. 1 and 2. Vllill the detent '24 1s elevated gear 14. The gears .43 and it have twiceas .1 locking disk 46 is fast out partially by tle complete depression of a key, an arm 59 on the detent is elevated so that it ust engiges with the under side of a projection 53 .(in the arm 51. Then continued movement of the detent ill efl'ected by arm 34 rocks tie arm 51, shaft 50 and arm 4.9 through the engagement of arm with I the projection 33so that the nose 48 on the il llii a9 is .arrie'd partially out of the notch Upon. rotation of the shaft 17 in disk 46.

45 the flat surf ice'fi-t of the disk 46 engages the nose 48 ant rocks the latter still further clockwise as vi awed in Fig. 52.

It can be'seea from the above description that the prese 1t invention admirably ful- 'fils its principal object of preventing a key from returning to normal position immediately after t l e operating mechanism is released. The machine cannot be releasedby a. partial operation of the detent 24: as the keygnust bell its fully de 'iressed position before the roll 51' 33 is. in position to be engaged loy the lower edge of the note-1135,

and even then the releasing of the machine it cannot be moved to undepressed position,

as. the plate has been sufficiently elevated by the depressed key to carry the hook 40 over the pin 27 on the key and the arm 34 at this instant not only prevents the detent from returning to normal position but still further elevates the detent. It can be seen that ifthe lower cam edge of the slot becomes worn down slightly so that the partial operation of a key will raise the roller 33 sulficiently to permit the arm 34 to be rocked rearwardly, the cam edge of the slot will elevate the detent 24 and the upper edge93 of the hook projection 43 for the particular key will engage the pin 27 on the key and force the latter into its fully'depressedposition. I I

In the drawings only a portion of the motor clutch is shown (Fig. 4). This form of clutch and motor connections has become well known in the art and it is not thought necessary to describe it in detail in the present application as they are fully shown and described in the Kettering and Chryst patent hereinbefore mentioned. In general,

35' i render the clutch effective; The clutch memthe ,clutch comprises a clutch member 57 which is-adapted to be given a slight preliminary movement about the shaft 58 under the action of a spring (not shown) to ber 57, I however, is normally restrained from such preliminary movement by the engagement of a flange'59 carried by the member 57 with a flange 60 formed on the rearwardly extending arm of a lever 61 which is pivoted at 62 to the right hand frame of the machine. The lever 61 on its rearwardly extending arm also carries a lug 63 normally engaging a shoulder 64. formed on a disk 65. fast on the shaft As will be noted from the train of gearing comprising the gears 44 and 43 and the gear 66, which is fast on the shaft 58 rotated by the motor and meshes with the gear 43 the shafts 13 and 45 are given'a single rotation at each operation of the machine' A spring- 67 tends to rock the-lever 61 about its pivot to withdraw the lug 63 from engagement with the shoulder 64 on the disk 65 and also withdraw the flange from the path of the flange '59 on the disk 57 to render the clutch effective. The movement of the lever 61 in this manner is prevented however by the engagementof a stud 68 on the lever 61 with the lower face of at projection 70 on an arm 71 fast on the shaft 37. It can be seen from i the above description that when the shaft 37 is rocked by the movement of the arm 34 the projection on the arm 71 is carried away from the stud 68 on the lever 61 and the spring 67 immediately acts to rock the lever 61 about its pivot thereby releasing the motor 0 era ting mechanism as described. When the s afts 13 and 45 have been given nearly one rotation,-during the operation of the machine a pin 72 on the gear, 43 engages the under side of a block 73 on the rear end ofthe lever 61 thereby rocking the lever 61 back to 'normal locking position. Then. when the arm 34, shaft 37 and arm 71 are rocked forwardly by the forward movement ofthe latch plate 16 (Fig. 1) as before described, the projection 70 on'the arm 71 is carried into locking engagement with the pin 68 thereby locking the lever 61 against move- 'ment until the next operation of the machine.

The device to be now described is provided to prevent a second operation of the machine when one of the initial keys 14 is held in manually at the end of an operation.- It has been found in practice that this is often attempted by persons who wish to operate the machine tocover such operations in which the proper amounts are not entered in the machine. In these attempts it is customary to push in one of the initial keys and hold it in depressed position at the end of the first operation thereby keeping the circuit for the motor closed and permitting an immediate second operation of the machine to destroy the indication of the first operation. The means in the present invention for preventing such misoperations comprises a pawl 75 (Figs. 1 and 3) mounted pivotally on the upper end of the arm 34 and the forward lower end of the pawl normally engages withthe upper side of a forwardly extending. projection 76 on the arm 31 ,of the. detent 24. A spring 77, connected at its on posite ends to the pawl 75 and a pin on arm 34, tends to pull the pawl 75 downward and a.

pin 74 on the arm 34 is used -to prevent the pawl frombeing drawn down past normal position. It is apparent that when aninitial key is depressed and the detent 24 raised thereby, the pawl 7 5 willv be rocked upwardly and then when the arm 34 is rocked the lower side of the pawl merely slides on the upper side of the projection 76, as shown in Fig. 3. When the arm 34, however, is rocked forwardly past normal position near the end of the operation .of the machine as above described, the pawl 75 is carried forwardly an extent sufficient to slide out'of engagement with the projection 76 and then its spring 77 draws the pawl downwardly into normal engagement with the pin 74. If the this position of the parts a projection'78 on the rear end of the pawl 75 engages under the projection 76 to retain the detent 24 in its partially operated position the detent having been lowered to this position by its spring 30. From the above description it is obvious that when a depressed initial key is retained in depressed condition at the end of the operation of the machine the-arms 34 and 71 are prevented from rocking rearwardly by the engagement of the forward end of the pawlfi'f) with the projection 7 6 to prevent the arm 34 from again raising the detent 24' whereby a second operation of the machine is prevented.

It is customary in machines of the present type to provnle means so that when an amount key is depressed in error it can be released before an operation of the machine is begun and this same means in the present invention is employed to rock the arm 34 to carry the pawl out of engagement with the projection 76 when an initial key has been held in depressed position at the end of the operation of the machine. This means comprises the shaft 80 extending longitudinally across the front of the machine and bearing pins 81 (Fig. 1) each of which is normally out of engagement with a corresponding pin 82 on the forward end of the latch plate 1(3. The shaft 80, as shownin Fig. 4. has faston its right hand end asmall operating lever R3 and a spring 84: normally retains the lever 83 and shaft 80 in the position shown inthis figure. When it is desired to release an amount key before the operation of the machine is begun it is necessary merely to press down on the forward end of the. lever 93 thereby rocking the shaft 80 to cause the pins 81 to engage the pins 82 so as to draw the operated latch plates 16 forwardly a sufficient extent to withdraw the locking. shoulder 18 from beneath the elevated detents 15' thereby permitting the release of the amount keys. It can be seen that when the. latch plate 16, shown in Fig. 1, is drawn forwardly its roller 41 engages the arm 3-tand rocks the latter slightly to carry the pawl 7 5 out of engagement with the protion. Finally when the lever 83.:is released the arm- 34: and latch plate 16 are returned-to the normal positions shown in Fig. 1.

A lever 88 (Fig. 4) is pivoted at 85 to the frame of the machine and at its forward end is provided with a slot 86 that straddles a pin 87 on the handle 83. When the handle 83 is depressed the lever 88 is rocked and a pro'ection 89 on the lever passes into a notch 90 ormed by a Whilethe machine 1s m operation, the projection 91 on the arm 71 is under the projection89 on the leverso that movement of the rejection 91 on the arm 71. v

the handle 83 cannot be moved torelease the amount keys during an operation of the machine. I

The pawl 7 5 is provided with the projection TSt'or re 1aimng the detent 24 in artially operated position so that an initial key whiclihas been heldin at the end of the operation will be retained in depressed position by the cetent plate 24 after the operator removes iis finger from the key. As the key is in leprcssed position the person attempting to igain'opcrate the machine can see at a glance at the keyboard that it isfirst necessary to operate the lever 83 to release the key. It'tlis projection 78 was not provided, the tricion existing between the projection 76 and the rear end of the pawl 75 might be sullic cut to retain the detent 24 in a slightly elevat d position when the operator removes his linger from the depressed key after the end of the operation of the machine. The pin 27 on the key at this time, if the projection 78 was not provided would engage the int lined edge 93 of the hook pros jection 40 as t 1e key moves to its normal position, this 11K vement of the key being snfiicient to slight y lower the detent 2% to permit the return of he key to normal position but not sufficient t.) move the detent 24: to normal position and ;lie.refore the rear end of the and prevent a :m 34 from being rocked rearwardly to. rcle \se the machine when the same or another initial key was depressed. \Vith the machine ii this condition it can be seen that a clerk :night attempt to operate the machine and consider the machine out of order because it could not be operated upon depression of his key, the clerk being liable to forget to operate the lever 83. However with the [)ltSt nt construction, em )loying the projection :78 as soon as the clerk perceives that one of t 1e initial keys is locked in it would occurinstantly to him'to operate the lever 83 and place the machine inicondition for operation. I

It is thouglt that the above description is snflicient for a. complete. understanding of the invention and therefore a detailed description. of is operation will not be given here. Briefly however, it may be stated that the present in vention is well adapted to perform its proper objects, as the machineis provided witl. one detent which is operated first partially by the operator 'andthen automatically by'means beyond the control of. the operatc I. By such a construction-it is impossible for the machine. to be released and for the initial key to be returned. to normal positi )n before the proper time dur ing the opera bion ot the machine.

While the iorm ,of mechanism here shown and described, isadmirablyadapted to fulfil the objects primarily stated, it isto be understood tl lat, it is not intended to concombination with operatin; means. of a nor-' mally etl'ective lockingalevice theretor. a plate having: two movements t'or rendering said locking device inetl'ective. depressible keys for grivingz said plate one movement, and means t'or antoniatically giving said plate its second movement when the plate has received its first movement.

In a machine of the class described the combination with operating: means. of a nor mally etl'ective.locking: device therefor. a plate havin two movements for rendering said locking device inetl'ectivc. depressible keys forgiving said plate one movement. and sprin; means for giving saidpl ate its second movement when the plate has received its first movement.

3. In. a machine'ot' the. class described the combination with operating means, of :1 normally ett'ective locking device therefor. depressible keys. means for rendering said locking! device ineti'ective and for locking the depressed keys in depressed position and partially operated by said keys. and means for automatically completing the operation of said rendering means. when a key is depressed completely. to render said locliillil device inefl'ta'tiveand lock the depressed key in depressed position."

4. In a machine of the class described the combination with operating means. of a normally eli'ective locking device therefor. de-

pressible keys. a detent plate having hook.

l-n'ojections. tor lockin; the keys in ile pressed position. and inclined edges. and capable 01 having two movements to render said locking device incli'eetive..one ot' the movements being gi'ven thereto by the cooperation of the depressed keyswvith said inclined edges. and a spring operated mem-.

berhaving a cannning surface for engaging said detentto give the latter its second mi'ivementwhen one ofsaid depressed.

ln-a machine of the class described the combination with operating means. of a normally effective locking device therefor. de-' pressible keys. a detent plate having inclined edges amt hook projections. t'or locking the keys in depressed position.'andeapable of having: two movements to render said locking device ineffective. one of the movements being given thereto by tl-ie-co 'iperation of the depressed keys with ,said inclined edges. and means, automatically perated. for giving said detent its second movement when one of said keys is fully depressed.

ti. In 'a machine of the class described the keys is' fully combination with. operating: means. of a normally etl'cctive locking-device therefor, depressible e vs.'a detent. normally out of operative relation with said locking device, ca pable ol' l't((l\'lll, two movements to render said locking device inett'ective. and provided with means for locking the depressed keys in operated position. one movement of the detent being imparted thereto by the keys to move the detent into operative relation with said locking device. amt means forantomatically giving" said detent its second movement- -to move said locking device out ,of locking antomaticallv operated. for giving said dctent its second movement when one. of said keys is fully depressed.

h. In a inachine ol' the class described the combination-with o a'-ratin; means. of a normally ctl'ective locking device therefor. depressible keys. a detent. normally out of op erat ive relation with said locking: device. ca-

pablc of receiving: two movements to render said lockin; device i|ietfecti\'e. and provided with means for locking the depl 'essed keys i operated position. and adapted to lock the nndcpressc-d keys against operation, one movement of the detent being imparted thereto by the keys to move. the detent into operative relation with said locking device.

and means for automatically eiving said detentits second movement to move said locking: device out of locking position and lock the depressed keys in depressed position and the undepressed keys in normal position.

9. In a machine. of the class described the combination with operating means, ofva locking device therefor normally in looking position, depressible keys, a detent normally putof operative relation with said locking device, capable of receiving two movements to move said locking device out of locking position, and provided with means for lock- 111gv the keys in depressed position one movement of the detent being imparted thereto bv the keys to move the detent in operative relation with said locking device, and t a spring operated camniing device for giving said 'detent its second movement to move the locking device out of locking' osition..

10. In a n1ac hine ofthe class scribed IIO vice ineffective and having two movements.

to accomplish this purpose, manipulative means for imparting one movement to said rendering means, automatic means for giving said rendering means the other movement, and means for preventing a second operation of said automatic'means when a key is retained in depressed position at the end of an operation of the machine.

11. In a machine of the class described the con'ibination with operating means, of a normally effective locking device therefor, means for rendering said locking device ineffective and having two movements to accomplish this purpose, manipulative means for imparting'one movement to said rendering means, automatic means for giving said rendering means the other movement, and a pawl carried by said automatic means for preventing a second operation of said automatic means when a key is retained in depressed position at the end of an operation of' the machine.

12. In a machine of the class described the combination with operating means, of

a normally efl'ective locking device there-' for, a plate having two movements for rendering said locking device ineffective, deipressible keys for giving said plate one movement, means for automatically giving said "plate its second movement when the plate has received its first ,movement, and means for retaining said plate in the position to which it is moved'by said keys and for preventing a second operation of said autoi'natlc means when a key is held in depressed position at the end of an operation of the machine.

13. In a machine of the class described the combination with operating means, of a normally effective locking device therefor, depressible keys, means for rendering said locking device inefl'ectiveand for locking the depressed keys in depressed position and partially operated by said keys,means for auton'iatically completing the operation of said rendering means, when a key is depressed completely, torender said locking device ineffective, and means forv retaining said rendering and locking means in partially operated position and for preventing a second operation of said automatic means when a key is held in at the operation of the machine. v

14. In a machine of the class described the combination with operating means, of a normally effective locking device therefor, depressible keys, a detent. plate having inclined edges and hook projections for locking "the keys in depressed position and capable of having two movements to render said lock-' ing device ineffective one of the movements in depressed position until after combination wivh operating means, of a normally efi'ecti're locking device therefor depressible keys a detent, normally out o operative relation with said locking device, capable of recei ing two movements to render said locking device ineffective, and provided with meal s for lockingthe depressed keys in operated position, one movement of the detent being imparted thereto by the keys to move the detent into operative relation with said locking device, means for automatically giving said detent its second movement to move said locking device out of locking position, and means for prevents ing a second operation of said automatic means if a key is held manually in depremed position until after the machine has been operated. i

16; In a mach ne of the class described the matically giving said detent its second move- 'ment to move said locking device out of;

lockingpositior, and means for preventing a second operaton of said automatic means and for lockin a keyin depressed position 1f a key is hel manually in depressed position until after the machine has been operated,

17. In a maihine of the class described the combination with an 0 rating mechanism, of ano cmally efi'ective locking device therefor, a cam member for rendering said lockin divice ineffective, means for automatical y operating, said cam member to render the 11 cking device inefiective, depressible keys controlling the operation of v said automatic means, and means, for preg venting a seco id operation of said automatic means when a key is held manually the operation of the ma chine. a a

18. In a machine of the clam described the combinatioi with an operating mechanism, ofva. normally effective locking device therefor, a plate having two movements the second of which renders said locking device ineffective. depressible keys for giving said plateone movement, automatic means controlled by said plate for giving said plate its second movement, a motor for driving said operating mechanism, and a locking device for rendering said motor ineffective and controlled by said automatic means.

19. In a l'nachine of the class described the combination with an operating mechanism, of a normally effective locking device therefor, a plate having two movements the second of which renders said locking device ineffective, depressible keys fogiving said plate one movement, the keys being'locked in depressed position by said plate, automatic'means, controlled by said plate, for giving said plate its second movement, a motor for driving, said operating mechanism, and a locking device for rendering said motor ineffective and controlled by said automatic means.

20. In a machine of the class described the combination with an operating mechanism of a normally effective ltKkiIlg device therefor, a plate having two movements the. second of whichjrenders said locking device ineffective, (lepressible keys for giving said plate one movement, automatic means, controlled by said plate, for giving said plate its second movement, a motor for driving said operating mechanism. a. normally effective spring operated locking device vfor rendering the motor ineffective, and connections from said automatic means for normally holding the motor locking device in effective position and operated by said automaticmeans when the automatic means gives said vplate its second movement, torelease said motor locking device.

21. In a machine of the class described the combination with operating means, of a normally effective device therefor, means for rendering said locking device ineffective and having two movements to accomplish this purpose, manipulative-means for imparting one movement to said rendering means, an-

tomatic means for giving said renderingmeans the other movement, means for preventing a second operation of said automatic means when a key is retained in depressed position at the end of an operation of the machine, andvmeans for disabling said preventing means. I

22. In a machine of the class described the combination with operating means, of a normally effective locking device therefor, means for rendering said locking device ineffective and having two movements to accomplish this purpose, manipulative means for imparting one movement to said rendering means, automatic means for giving said rendering means the other movement, means for preventing a second operation of said automatic means when akey is retained in depressed position at the end of'an operation of the machine, means for disabhng said preventing means, and means for preventing the operation of said disabling means during the operation of the machine.

In a machine of the class described the combination with operating means,0f a normally effective locking device therefor, means for rendering said locking device ineffective and having two movements to accomplish this purpose, manipulative means for imparting one movement to said rendering means, automatic means for giving said rendering means the other movement, a pawl carried by said automatic means for preventing a second operation of said automatic means when a. key is retained in depressed position at the end ofan operation of' the machine, and manipulative means for disabling said pawl.

2+. In a machine of the class described the combination with operating means, of :1 normally effective locking device therefor, means for rendering said locking device ineffective and having two movements to accomplish this purpose, manipulative means for imparting one movement to said rendering'means, automatic means for giving said rendering means the other movement, a pawl carried by said automatic means for preventing a second operation of said automatic means when a key is retained in depressed position at the end of an operation of the machine, manipulative means for disabling said pawl, and means for preventing the operation of said disabling means during the operation of the machine.

25. In a machine of the class described the combination with operating means, of a norinally effective locking device therefor, depressible keys, means for rendering. said locking device ineffective and for locking the depressed keys in depressed position and,

partially operated by said keys, means for automatically completing the iperation' of said rendering means, when a key is depressed eomplctely, to render said locking device ineffective, means for retaining said rendering and locking means in partially operated position and for preventing a sec ond operation of said automatic means when a key is held in at the operation of the,machine, and means for disabling'said retaining means.

26. In a machine of the class described the combination with operating,means of a. normally effective locking device therefor, deprssible keys, means for rendering said locking device ineffective and for locking the depressed keys in depressed position and partially operated by said keys, means for automatically completing the operation of said rendering means, when a key is depressed completely, to render said locking device ineffective, means for retaining said rendering and locking means in partially operated position and for preventing a ond operation of said automatic means when a key is held in at the operation of the ma.- chine, means for disabling said retaining means, and means for preventing operation of said disabling means during the operation. of the machine.

27. In a machine of the class described the combination with a plurality of depressible keys, of locking means therefor prepared for effective operation by operation of said keys, and automatically operated cam means effective upon the preparation of said locking means for actuating the latter to lock the keys in operated position.

28. In a machine of theclass described the combination with a plurality of manipulative means, of locking means therefor prepared for efi'ective. operation by operation of said manipulative means, and automatically operated cam means effective upon the preparation of said locking means for actuating the latter to lock the manipulative means in operated position.

29. In a machine of the class described the combination with a'plurality of depressible keys, of locking means therefor prepared for effective operation by operation of said keys, and auton'iatically operated cam means effective upon the preparation of said locking means for actuating the latter to lock the keys depressed in operated position, and the undepressed keys in normal position.

30. ,In a machine of the class described the,

combination with depressible keys, of a detent therefor, having hook projections for locking the keys in depressed posltion and prepared for effective operation by depression of said keys, and an autol'natically, operated member having a cam edge for engaging said detent and rendered effective to actuate the detent thereby upon preparation of the latter.

31. In a machine of the class described the combination with depressible keys, ofa detent therefor, having, hook projections for locking the depressed keys in depressed position and the undepressed keys in normal position and prepared for effective operation by depression of said keys, and an automatically operated member having a cam edge for engaging said detent and rendered effective to actuate the detent thereby upon preparation of the latter.

32. In. a machine of the class described the combination with a bank of keys, of a detent having hooked projections for looking the keys in depressed position and inclined edges with whichthe keys cooperate to operate parti llly said detent, and a spring operated memlu 1' having a camming surface for engaging sa .d detent to complete the operation of the latter after it has been operated partially. by said keys wherebythe lat- I fective upon the preparation of said locking means for actuating the latter to lock the keys in operatad position, and means for preventing a Si cond operation of said cam means when a key is retained in depressed position at the end of an operation of the machine. i

34. In a machine of the COllllJlIliIt-lOl with an operating mechanism, of a plirality of depressible keys, locking means for the keys prepared for effective operation by the operation of said keys, automatically operated cam means effective upon the preparation of said locking means for actuating the latterto lock the keys in o'ierated position, means for preventing a s :condoperation of said cam means when a key is retained in depressed position at the end of an operation of the machine, and rieans for disabling said preventing means 35. Ina ma :hine of the class described the combination with an operatin mechanism, of a pl .irality of depressifile keys, locking means for the keys prepared for effective operatim by the operation of said keys, automatically operated cam means effective upon tie preparation of said locking means for actuating the latter to lock the keys in ope rated position,means for preventing a sec )nd operation of said cam means when a key is retained indepressed position at tht end of an operation of the machine, means for disabling said prevent ing means. nianipulative means for disabling said p1 eventing means, and means for locking said manipulative means against operation during the operation of the machine.

36, In a machine of the class described the combination with operating mechanism, of' a plu'ality of keys, a detent therefor partially operated by said keys, automatic means for completing the operation of said dctent,'means for disabling said au'- tomatic means during the operation of the machine. and means for preventing a second operation of Sllld automatic means if a key is retained in iepressed position at the end of an operation of the machine.

37. In a ma chine of the class described the combination with an operating mechar the class described nism, of a plurality of keys, a' detent for said keys partially operated by the latter, automatic means for completing the operasaid automatic means during the operation of the machine to permit the release of the depressed keys, and means for retaining said detent in the position to which it is'moved by said keys to look a depressed key in depressed position after the operation of the 10 machine if the key has been held in until after the proper time for its release. tion of said detent, means for disabling In testimony whereof I afiix my signature in the presence of two witnesses.

HAAKON A. MARTIN. \Vitnesses F. HAMILTON, J. B. RICKETTS. 

